To cite individual in publications use:

Charles et al., (2021). individual: An R package for individual-based epidemiological models. Journal of Open Source Software, 6(66), 3539, https://doi.org/10.21105/joss.03539

Corresponding BibTeX entry:

  @Article{,
    title = {individual: An R package for individual-based
      epidemiological models},
    author = {Giovanni D. Charles and Sean L. Wu},
    journal = {Journal of Open Source Software},
    year = {2021},
    volume = {6},
    number = {66},
    pages = {3539},
    url = {https://doi.org/10.21105/joss.03539},
    doi = {10.21105/joss.03539},
    publisher = {The Open Journal},
  }